What does this LOINC code represent?

This LOINC code identifies a lab observation, measurement, question, or clinical concept in a standardized format.

Is this enough to understand my test result?

No. The code identifies the test or observation, but the interpretation depends on the actual result, reference range, and clinical context.

LOINCActiveObservation

LOINC Code 33144-7: Fetal Body weight estimated on US by Tokyo 1987 method

Name: LOINC Code 33144-7: Fetal Body weight estimated on US by Tokyo 1987 method
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:20.067Z

33144-7 is a LOINC code used to identify Fetal Body weight estimated on US by Tokyo 1987 method in laboratory and clinical observation data. You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges. LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component Body weight. It is commonly used with the system or sample type ^Fetus.

Reviewed by HealthAssure Clinical TeamUpdated 21 May 2026

What is this code?

LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component Body weight. It is commonly used with the system or sample type ^Fetus.

When is it used?

Used in lab systems, EHRs, and clinical data exchange.
May identify a test, observation, survey item, or clinical document request rather than a diagnosis.
Status: ACTIVE
Order vs observation: Observation
Method: US+Estimated from Tokyo 1987

What it does not mean

The code identifies the observation or test, not the actual result.

Key facts

Fetal Body weight estimated on US by Tokyo 1987 method
Body weight
87; Bdy weight; bod; Bodies; BPD & APAD & TAD & FL; by Tokyo87; Echography; EFW; Est; Estimated fetal weight; estimation; Fetal; Gyn; Gynecology; OB; ObGyn; OBSTERICAL; OBSTERICAL.ULTRASOUND; Obstetrical; Obstetrics; Point in time; predicted; QNT; Quan; Quant; Quantitative; Random; Sonogram; Sonograph; Sonography; ULS; Ultrasound; Wt

Where you may see this code

You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges.

Common synonyms

Fetal Body weight estimated on US by Tokyo 1987 methodEFW by Tokyo87Body weightOB.USMassPt^Fetus

Frequently asked questions

Code details

Code33144-7

SystemLOINC

Display nameFetal Body weight estimated on US by Tokyo 1987 method

DescriptionBody weight

Short nameEFW by Tokyo87

ComponentBody weight

PropertyMass

TimingPt

System (specimen)^Fetus

ScaleQn

MethodUS+Estimated from Tokyo 1987

ClassOB.US

Example unitskg

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.09

Last changed2.70

Part names

Body weightMassPt^FetusQnUS+Estimated from Tokyo 1987Point in time (spot)Ultrasound+Estimated from Tokyo 1987

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from LOINC. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.